Nicole N Wermuth

US Patent:

7480558, Jan 20, 2009

Filed:

Feb 28, 2007

Appl. No.:

11/680161

Inventors:

Jun-Mo Kang - Ann Arbor MI, US
Chen-Fang Chang - Troy MI, US
Man-Feng Chang - Troy MI, US
Nicole Wermuth - Ann Arbor MI, US

Assignee:

GM Global Technology Operations, Inc. - Detroit MI

International Classification:

G06F 19/00
F02M 25/07
F02B 47/08

US Classification:

701108, 123295, 12356821

Abstract:

The invention comprises a method for controlling operation of a homogeneous charge combustion ignition engine operating in an auto-ignition mode. The method comprises determining a desired combustion phasing; and, controlling a mass flowrate of externally recirculated exhaust gas based upon an actual combustion phasing. A closed-loop control scheme is executed to control the mass flowrate of externally recirculated exhaust gas based upon a difference between the actual and the desired combustion phasing.

US Patent:

7845335, Dec 7, 2010

Filed:

Mar 23, 2009

Appl. No.:

12/408816

Inventors:

Hanho Yun - Oakland Township MI, US
Nicole Wermuth - Ann Arbor MI, US
Paul M. Najt - Bloomfield Hills MI, US
Jun-Mo Kang - Ann Arbor MI, US

Assignee:

GM Global Technology Operations, Inc. - Detroit MI

International Classification:

F02M 7/28
F02P 5/00
F02D 41/06

US Classification:

123435, 123436, 12340655

Abstract:

An engine operating in a spark-assisted homogeneous charge compression ignition mode during warm-up cycle is controlled using settings determined by interpolating between cold engine temperature settings fully warmed-up engine temperature settings.

US Patent:

7894976, Feb 22, 2011

Filed:

Apr 29, 2009

Appl. No.:

12/431805

Inventors:

Hanho Yun - Oakland Township MI, US
Nicole Wermuth - Ann Arbor MI, US
Barry L. Brown - Lake Orion MI, US
Jun-Mo Kang - Ann Arbor MI, US
Paul M. Najt - Bloomfield Hills MI, US

Assignee:

GM Global Technology Operations LLC - Detroit MI

International Classification:

F02M 7/28

US Classification:

701110, 123435, 123436, 7311443

Abstract:

A method for controlling a homogeneous-charge compression-ignition capable engine, operating with spray-guided spark ignition stratified combustion at low load, includes monitoring a speed of the engine, monitoring a load of the engine, determining a desired fuel pressure based upon the speed of the engine and the load of the engine, and utilizing the desired fuel pressure to control fuel injection into the engine, wherein the desired fuel pressure is calibrated to the speed and the load based upon increased stability of the engine at lower fuel pressures and lower soot emissions from the engine at higher fuel pressures.

US Patent:

7899601, Mar 1, 2011

Filed:

Mar 2, 2009

Appl. No.:

12/395747

Inventors:

Hanho Yun - Oakland Township MI, US
Nicole Wermuth - Ann Arbor MI, US
Paul M. Najt - Bloomfield Hills MI, US
Jun-Mo Kang - Ann Arbor MI, US
Gunter Gräwert - Erzhausen, DE

Assignee:

GM Global Technology Operations LLC - Detroit MI

International Classification:

G06F 17/00
F02D 19/00
F02B 7/08

US Classification:

701103, 701108, 123295, 123435

Abstract:

A method for operating an internal combustion engine including extended operation in a homogeneous charge compression ignition mode at high loads includes operating the engine in the homogeneous charge compression ignition mode including spark-assisted ignition, monitoring an engine load, monitoring an engine speed, determining the engine to be in a high ringing range based upon the engine load and the engine speed, and when the engine load is in the high ringing range, operating the engine in a reduced ringing mode. The reduced ringing mode includes modulating a fuel injection timing according to a calibrated maximum combustion chamber cooling fuel injection timing, determining a preferred combustion phasing value, and modulating a spark timing based upon the modulated fuel injection timing and the preferred combustion phasing value.

US Patent:

7918205, Apr 5, 2011

Filed:

Apr 25, 2008

Appl. No.:

12/109416

Inventors:

Nicole Wermuth - Ann Arbor MI, US
Tang-Wei Kuo - Troy MI, US
Paul M. Najt - Bloomfield Hills MI, US

Assignee:

GM Global Technology Operations LLC - Detroit MI

International Classification:

F02D 13/00
F02M 25/07

US Classification:

123295, 123 9015

Abstract:

A method for transitioning operation of a spark-ignition, direct-injection internal combustion engine having a two-step, variable phase valvetrain between HCCI and SI modes includes providing a low-lift intake valve, un-throttled stoichiometric SI operation intermediate a low-lift exhaust and intake valve HCCI mode and a high-lift exhaust and intake valve, un-throttled SI mode.

US Patent:

8099230, Jan 17, 2012

Filed:

Dec 18, 2008

Appl. No.:

12/338028

Inventors:

Nicole Wermuth - Ann Arbor MI, US
Tang-Wei Kuo - Troy MI, US
Paul M. Najt - Bloomfield Hills MI, US

Assignee:

GM Global Technology Operations LLC - Detroit MI

International Classification:

F02M 7/28
F02D 41/24

US Classification:

701111, 123435

Abstract:

A method for controlling an amount of fuel reforming in an internal combustion engine configured to selectively operate in a homogeneous charge compression-ignition combustion mode with an exhaust recompression strategy includes monitoring in-cylinder pressures during a current combustion cycle, utilizing the monitored in-cylinder pressures to project reforming required in a next combustion cycle, and controlling the next combustion cycle based on the projected reforming required in the next combustion cycle.

US Patent:

8186329, May 29, 2012

Filed:

Feb 11, 2009

Appl. No.:

12/369086

Inventors:

Nicole Wermuth - Ann Arbor MI, US
Paul M. Najt - Bloomfield Hills MI, US
Hanho Yun - Oakland Township MI, US

Assignee:

GM Global Technology Operations LLC - Detroit MI

International Classification:

F02B 5/02
F02D 41/02
F02D 13/02

US Classification:

12340619, 123299, 123305, 701103

Abstract:

A spark-ignition direct-injection internal combustion engine is controlled at low loads through split fuel injections and spark discharges including one injection and spark during a negative valve overlap period and another injection and spark during a compression phase of the engine cycle.

US Patent:

8191519, Jun 5, 2012

Filed:

Apr 24, 2009

Appl. No.:

12/429420

Inventors:

Nicole Wermuth - Ann Arbor MI, US
Paul M. Najt - Bloomfield Hills MI, US
Hanho Yun - Oakland Township MI, US

Assignee:

GM Global Technology Operations LLC - Detroit MI

International Classification:

F01L 1/34

US Classification:

123 9016, 123 9015

Abstract:

An internal combustion engine includes intake and exhaust camshafts including high-lift lobes and low-lift lobes separated by a lobe separation angle. The engine transitions between operating in a controlled auto-ignition combustion mode with positive valve overlap and a controlled auto-ignition combustion mode with negative valve overlap solely by selecting the corresponding one of the high-lift lobes and the low-lift lobes.